Industrial Shed Demand in India
India's industrial construction sector is booming driven by:
- Make in India and PLI schemes attracting manufacturing investment - E-commerce driving demand for large-format warehouses (1–5 lakh sq.ft) - GIDC/MIDC/RIICO industrial estates expanding with new allotments - China+1 strategy bringing FDI into Indian manufacturing - Data centres and logistics parks as new asset classes
Industrial sheds range from 2,000 sq.ft workshop sheds for MSMEs to 10 lakh sq.ft distribution centres for e-commerce giants. The two dominant construction methods are PEB (Pre-Engineered Building) for speed and RCC frame for permanence.
VRSIPL constructs both PEB foundations (the critical civil scope that PEB suppliers don't do) and complete RCC-framed industrial buildings across Gujarat's GIDC estates.
PEB vs RCC — Technical Comparison
PEB (Pre-Engineered Steel Building):
- Structure: Steel columns, rafters, purlins — manufactured in factory, assembled on site - Cladding: Colour-coated steel sheets (0.5mm) for roof and walls - Span: Up to 90m clear span (no internal columns) - Speed: 60–90 days from foundation to handover - Cost: ₹1,200–1,800/sq.ft (all-inclusive with foundation) - Life: 30–40 years (depends on maintenance/recoating) - Best for: Warehouses, automobile plants, food processing, any large-span requirement
RCC Framed Building:
- Structure: RCC columns, beams, slabs — cast in-situ - Cladding: Masonry walls with plaster, RCC slab roof (or AC sheets on steel trusses) - Span: Economical up to 12m (beyond needs heavy beams or trusses) - Speed: 6–12 months - Cost: ₹1,800–3,000/sq.ft - Life: 60–100 years - Best for: Multi-storey factories, pharma plants, heavy-equipment foundations, permanent structures
Hybrid Approach (Most Common):
RCC structure for process areas (where heavy loads, precision floors, or multi-storey is needed) + PEB for warehousing and utility areas. This optimises cost while meeting functional requirements.
VRSIPL delivers both — RCC-framed factory buildings for process industries and PEB foundation packages for steel building contractors.
PEB Foundation Construction — The Civil Contractor's Role
PEB suppliers (Zamil, Kirby, Tiger Steel, etc.) design and supply the steel structure. But the foundation is the owner's responsibility — and this is where the civil contractor is critical.
PEB Foundation Types:
1. **Isolated Column Foundations:** Separate RCC pad footings (1.5m x 1.5m to 3m x 3m, 1–2m deep) at each column location. The most common type for single-storey PEB sheds.
2. **Combined Footings:** When column spacing is tight or soil bearing capacity is low, adjacent columns share a combined footing.
3. **Pile Foundations:** In poor soil (marine clay, filled-up ground), bored piles (300–600mm dia, 6–15m deep) with pile caps support the PEB columns.
Anchor Bolt Setting — The Critical Interface:
PEB columns connect to the foundation through anchor bolts (typically 4–12 bolts per column, M24–M36 grade 8.8). These must be set with ±3mm tolerance in all three dimensions. Any error means the PEB column won't fit — and rework is extremely expensive.
VRSIPL's approach:
- Use precision anchor bolt templates (laser-cut steel plates) supplied by the PEB vendor - Survey each bolt group after concrete pour using total station - Correct any deviation before concrete hardens - Achieve zero-rejection rate on bolt group accuracy
Other civil scope for PEB projects:
- Site grading and compaction - Floor construction (M25 VDF concrete floor, 150–200mm thick, with joint-free panels up to 20m x 20m) - Plinth beams and plinth walls (600mm above FGL) - Utility trenches and pits - External works (roads, drains, boundary wall)
Industrial Flooring — The Most Abused Surface
Industrial floors take more punishment than any other element — forklift traffic, heavy storage loads, chemical spills, and thermal cycling. Types:
VDF (Vacuum Dewatered Flooring):
M25–M30 concrete poured, vacuum-dewatered (removing excess water), power-trowelled to a smooth, dense finish. Surface hardness: minimum 40 MPa. The standard for warehouses and logistics centres.
Tremix Flooring:
Similar to VDF but uses ride-on power trowels (Tremix machines) for finishing. Produces excellent flatness (FM2 class per TR34) over large areas.
Epoxy-Coated Floors:
For pharma, food processing, and electronics — VDF base with 2–3mm epoxy or polyurethane coating. Chemical-resistant, seamless, and easy to clean.
Heavy-Duty Floors:
For foundries, steel plants, and heavy engineering — 250–300mm M30 concrete with steel fibre reinforcement (25–40 kg/m³). Designed for point loads of 20+ tonnes.
Key specifications:
- Flatness: FM2 (F25/F20 per TR34) for racking aisles, FM3 for general warehousing - Joint layout: 6m x 6m panels (VDF) or 20m x 20m joint-free panels (laser screed) - Saw-cut joints within 8 hours of casting to control random cracking - Floor hardener (dry shake or liquid lithium silicate) for abrasion resistance
VRSIPL has constructed 5+ million sq.ft of industrial flooring — from basic factory floors to FM2-class VRN (Very Narrow Aisle) warehouse floors.
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